Dipper tooth



May 16, 1933. L. E. YOUNIE 11,909,850

DIPPER TOOTH Filed Feb. 12, 1931 2 Sheets-Sheet 1 \\Q ZZ ATTUFZ/VE/Patented May 16, 1933 UNITED STATES PATENT OFFICE E. YOUNIE, OEPORTLAND, OREGON, ASSIGNOB "1'0 ELECTRIC STEEL FOUNDRY COMPANY, OFPORTLAND, OREGON DIPPER TOOTH Application filed February 12, 1881.Serial No. 515,183.

Dipper teeth are subjected to great strains and to very severe wear. Ithas been common, therefore, to make these teethof material, such asmanganese steel which is very diflicult, in fact, practically impossibleto relation to material that will stand wear.

With the present invention a very simple construction is provided whichmay be readily fabricated and which may be conveniently and securelyassembled. In addition to this the tooth point as formed is reverslbleand this is accomplished without added ex ense so far as the structureis concerned. Ot er features and details of the invention will appearfrom the specification and claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawings as follows Fi 1 shows a portion of a fragment of alip o a dipper on which teeth are arranged.

Fig. 2 a perspective view of a tooth with a vertical arrangement of thecutting edge of the tooth.

Fig. 3 a section on the line 3-3 in Fig. 1.

Fig. 4 a section on the line H in Fig. 1.

Fig. 5 a central vertical section through a tooth and a portion of thelip.

Fig. 6a section on the line 6-6 in Fig. 5.

Fig. 7 a side elevation of an alternative construction of tooth.

Fig. 8 an end view thereof.

The base of the dipper tooth 12 has the usual rforated shank 10 and isprovided at its ront end with a point-securing projection 11 preferablyhaving the shape of a truncated pyramid. The base has the usual upperlip forming a slot 13 between this 11p and the shank 10 into which thelip, or edge 14 of the dipper extends, the dipper being provided withthe usual walls 15 and the tooth being secured with the usual rivets 16.The base is provided with the vertically extending key opening 17 andwith a horizontally extending key opening18 and also with an axiallyextending opening 19; The tooth point 20a of the tooth in the ordinaryform has the chisel cutting edge with inclined faces 2020 extendingtherefrom and the side faces 21. It is provided with a socket 22 havinga form correspondin to and adapted to receive the tapered proiection 11.It is also provided with an axial y extending shank 23 which is adaptedto extend into the opening 19. The shank is provided with a key opening24 and the shank is preferably four-sided and adapted to enter theopening 19. The key opening 24 is so placed that wlth the oint assembledthe openings 17 or 18 will be approximately in register with said openin24; A ke 25 is driven and through the opening 24, the off-setting of theopening 24-being such that as the key is driven home strain is put onthe shank and in consequence the walls of the socket 22 are seated inwedging enga ement with the walls of the pro'ectlon 11 so t at the pointis rigidly secure on the base. The parts of the point, projection andshank, overla each other and thus strengthen the connection between thepoint and the base.

It will be noted that the point may be reversed so as to moreeffectively use it as it wears, or it may be set at 90 usin the opening18 with the key, thus placin t e point in the position shown in Fig. 2.fihus a point fully reversible, or adjustable, as to four positions isprovided without any added cost as to fabrication.

In Fig. 8 a tooth point of pyramidal form is shown having side faces 28.

What I claim as new is 1. In a dipper tooth, the combination of a baseand a point, one of which has an axiall extending tapered projection andthe other a tapered socket receiving the projection, the point having anaxially extending shank and the base an axially extending openingreceiving the shank, the shank having a key opening and the base havingkey openings set at 90 arranged to register with the key opening of theshank in any position of the shank; and a key in the opening locking thepoint in place.

2. A dipper tooth base having a tapered projection and an axiallyextending opening I in the base extending through the projection, saidbase having two key openings at right angles to each other extendingthrough the axially extending opening.

5 3. In a dipper tooth, the combination of a base and a point, one ofwhich. has an axially extendi'ngf tapered 4 projection {having surrounding converging side walls having an mclination to the axis of lessthan 45 and the 10 other" having a tapered socket having surroundingconverging side walls receiving the projection, the point having anaxially extending shank and the base an axiallyrextending openingreceiving the shank; and means engaging the shank securing the pointonthe base.

" 4.1111 a dipper tooth, the combination of a base and a point, the basehaving an axially extending tapered projection having sur-.

1 0 rounding. converging side walls having an inclination to the axis ofless than 415 and the point having "a tapered socket having surro'undingconverging side walls receiving the projection, the point having anaxially extending shank and the base an axially extending openingreceiving the shank; and "means engaging the shank securingthe point "onthe base.

5. A dipiper tooth point having a cutting .39 edge at its ront; aprojection-receiving sock- "et at its rear, said socket having surround-;ing converging side walls having an inclination-to the axis of lessthan 45; and an axially extending shank extending from the base of thesocket.

6. A dipper tooth base having a tapered projection having surroundingconverging side walls having an inclination to the axis of less than 45;and an axially extending opening in the base extending through theprojection.

In testimony whereof I have hereunto set my hand.

LEWIS E. YOUNIE.

